-> Sanity Check for Selection History

Some operations like edge loop deselect would cause selection history
to become invalid. Added a sanity check to countall() to try and catch
these when they happen.

source/blender/include/BIF_editmesh.h

@@ -93,6 +93,7 @@ extern void EM_selectmode_flush(void); // when selection changes
 extern void EM_convertsel(short oldmode, short selectmode);
 extern void EM_remove_selection(void *data, int type);
 extern void EM_store_selection(void *data, int type);
+extern void EM_validate_selections(void);
 
 extern int EM_nfaces_selected(void);
 extern int EM_nvertices_selected(void);

source/blender/src/edit.c

@@ -612,7 +612,7 @@ void countall()
 				if(efa->f & SELECT) G.totfacesel++;
 			}
 			
-			/*add code to strip editselections*/
+			EM_validate_selections();
 		}
 		else if (G.obedit->type==OB_ARMATURE){
 			for (ebo=G.edbo.first;ebo;ebo=ebo->next){

source/blender/src/editmesh_lib.c

@@ -71,7 +71,7 @@ editmesh_lib: generic (no UI, no menus) operations/evaluators for editmesh data
 
 #include "editmesh.h"
 
-/* ********* Selection ************ */
+/* ********* Selection History ************ */
 static int EM_check_selection(void *data)
 {
 	EditSelection *ese;
@@ -105,6 +105,20 @@ void EM_store_selection(void *data, int type)
 	}
 }
 
+void EM_validate_selections(void)
+{
+	EditSelection *ese, *nextese;
+	EditMesh *em = G.editMesh;
+	ese = em->selected.first;
+	while(ese){
+		nextese = ese->next;
+		if(ese->type == EDITVERT && !(((EditVert*)ese->data)->f & SELECT)) BLI_freelinkN(&(em->selected), ese);
+		else if(ese->type == EDITEDGE && !(((EditEdge*)ese->data)->f & SELECT)) BLI_freelinkN(&(em->selected), ese);
+		else if(ese->type == EDITFACE && !(((EditFace*)ese->data)->f & SELECT)) BLI_freelinkN(&(em->selected), ese);
+		ese = nextese;
+	}
+}
+
 static void EM_strip_selections(void)
 {
 	EditSelection *ese, *nextese;